Original from:
<http://www.hdrsoft.com/images/appart/tm790.jpg>

Command:
djpeg original.jpg  | srgbtoxyz | ./xyzlum -g2 |
	./xyznld -s1.1 -g5 2>/dev/null | ./xyzlum -g4 | xyztosrgb -c |
	pnmdepth 255  | cjpeg >/tmp/result.jpg